Perl

Check if a MIME Entity is multipart/alternative

Demonstrates the Chilkat Mime.IsMultipartAlternative method, which returns whether the Content-Type is exactly multipart/alternative. It takes no arguments.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own file.

Background: Recognizing multipart/alternative matters because its children are the same content in different formats — you display one (usually the last renderable), not all of them. That is the opposite of multipart/mixed, where every child is shown.

Chilkat Perl Downloads

Download Chilkat for Perl

Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# Demonstrates the Mime.IsMultipartAlternative method, which returns whether the Content-Type is multipart/alternative.  It takes no arguments.

my $mime = Chilkat2::Mime->new;
my $success = $mime->LoadMimeFile('qa_data/multipart_message.eml');
if (!$success) {
    print $mime->LastErrorText, "\n";
    exit;
}

if ($mime->IsMultipartAlternative()) {
    print "This is a multipart/alternative entity.\n";
} else {
    print "This is not multipart/alternative.\n";
}